Valve



H. B-. BABSON AND J. J. STAMPEN.

VALVE. APPLICATION FILED AUG-l8, 1920.

Tatnted May 23, 1922.

2 SHEETS-SHEET I.

- fidazzorg- H. B. BABSON AND .I. J. STAMPEN VALVE.

APPLICATION FILED AUG-l8, I920- Patented May 253, 1922 2 SHEE TSSHEET 2.

6 I 05% Em 6072.

UNITED STATES PATENT OFFICE.

HENRY B. BABSON AND JACOB J. STAMPEN, OF CHICAGO, ILLINOIS.

' vALvE.

Application filed August 18,1920. Serial No. 404,413.

. useful Improvement in Valves, of which the small space and requires little or no atteninlet port on one side of the disc and nism illustrated in ings in whichfollowing is a specification.

Our invention relates to'valve structures, and the general object of the invention is to provide a simple, durable and efficient construction, in which the valve occupies but tion 'or repairs. Another object is to provide a combined valve and gasket, the gasket forming means for making an air tight closure and also serving. to hold the valve centralized and maintain it in proper relation to the ports. Another object is to provide a construction such that a single thin sheet of metal will perform the function of both an inlet and an outlet valve. Still another object is to provide a valve so constructed that it operates as a result of its flexure and the flexure is virtually concentrated along a line where the stiffness is reduced. A further object is to cause a quick closure of the valve, and to this end a permanent set or bend is formed in the valve, forcing it gently toward the ported valve seat. Another object is to provide a construction in which two chambers are mounted end to end, each chamber being provided with a ported chamber head with an intervening valve disc, one chamber head having an the other an outlet port on the opposite side of the disc, the ports being arranged approximately diametrically opposite to each other, each chamber head being recessed at a point opposite to the port in the companion chamber head for permitting the disk to uncover the port and at the same time limit the amount of movement the port We accomplish our objects by the mechathe accompanying draw- Figure 1 is an assembly view showing the combined valve and gasket mounted in the head of a cylinder of a type appropriate for an air pump or a compressor, the view being taken in axial section;

Figure 2 is a face view of the valve and associated parts taken on the line 2-2, Fig ure 1; a

Specification of Letters Patent.

of the disc away from Patented May 23, 19.22.

Figure 3 is a separated view showing the parts in perspective and illustrating their relative positions and functions.

Figure 4 is a diametral sectional view of the combined valve and gasket taken on a line" drawn from the group of inlet ports to the group of outlet ports. The drawing shows the permanent bend or set whichfor facilitating quick is absent and the valve is held in place simply by the transverse diametral zone along which the valve is in close contact with the valve seats. This figure shows one of the valve seats in proper position relative to the valve.

Figure 7 is a sectional view on the line 7-7, Figure 6.

'ke numerals denote out the several views. Viewed in its broadest aspect, our present invention has certain characteristics shown in our copending application filed on the 13th day of August, 1920, Serial No. 403216 (Case 17).

Referring first to the form ures 1 to 4 inclusive:

We have chosen to illustrate the invention as associated with the cylinder of an air pump such, for example, as may be used for exhaustingthe air from a tank used in connection with a milking machine. In this particular embodiment of the invention, there is a cylinder 1 which is provided with an inner cylinder head 2 and an outer cylinder head 3, the parts being fastened together by bolts 4 or other appropriate means. A chamber 6 is formed in the outer head-3 and communicates with a passage 8 which leads from the tank from which air is to be exhausted. It will thus be seen that there are in the present case two chambers arranged end to end, and provided with chamber heads which lie adjacent to each other. In the illustrated form there is a set of inlet ports 10 in head 3 for admitting air into the cylinder and a set of outlet ports like parts thr0ughshown in Figi 11 in head 2 for permitting the air to escape,

The head 2 also has a set of passages 12 through which air enters the cylinder, and head 3 has a set of passages 13 through which air may escape to the atmosphere.

Interposed between the heads 2 and 3 1s a plate of thin resilient metal which const1- tutes a combined gasket and valve. In the particular form shown the valve forms a combined inlet and outlet valve. The plate 18 preferably a disc of thin steel having an outer ring 16 which forms a gasket and an inner portion 18 which forms the inlet andoutletvalves. These two portions are separated by-circular slots 19wihich are of sufficient width to perinit the freev passage of air-during the operation of the machine. These-slots terminate. at a fdialmetral zone" 6, leaving the valve portion integral with the ring at the center.

Inthe illustrated construction the slots 19' at' their ends extend inward a short distanceapproximately radially,- thus weakening the-metal slightly and permitting it to I flex more readily along approximately diametral "lines. In other words, the slots terminate in approximately radial portions 20, the purpose whereof is to permit the peripheral portion of the inner disc to swing freely toward and from the ports under the action of the air.

It-is desirable, however, to form-a perma nent bend or set in the valve along the margin AA and B-B of the diametral zone for causing the valve to normally press slightly against the valve seat thus tending to produce a quicker closing action of the valve. The passages 10, 11, 12 and 13 are preferably arranged on the arc of a circle, as illustrated, and it will be noted that the inlet ports are arranged on a circle whose diameter is smaller than the diameter of the valve. This enables the valveto cover the ports when in contact with the chamber heads 2, 3. The location of the ports 12 and 13 is non essential, but by preference they are opposite to the slots 19 so that the air passing through the slots may readily reach said passages. It will'be evident that the chamber heads 2, 3 constitute flat ported Valve seats. In practice the chamber heads are drawn into ti ht contact with the diametral zoneofthe va ve. One result is that leakage direct from the inlet to the outlet ports is thus prevented. Another result which is of importance in connection with the non gasket type shown in Figures 6 and 7 is that this zone or area of contact is sufficient to support the valve and firmly hold it in place.

A recess 22 is formed in the chamber head 2 for permitting the valve disc to move away from the inlet ports 10, and a recess 24 is formed in the chamber head 3 for permitting the valve disc to move away from the outlet ports 11. These recesses, as best shown in Figures 1 and 3, are deeper near the circumference than at the center, and their inner Y gasket '32.

walls form stops for limiting the movement of thevalve disc in a direction to uncover the ports.

In operation. let it be assumed that the will cause the valve. disc to close the inlet ports 10- andopen-the outlet ports 11, thus.

forcing air out of the cylinder into the atmosphere. Consequently. the reciprocation ofthe pistonwill draw air from the passage 8 and discharge itinto the atmosphere.

The outer ring or asket portion 16 serves the. dual purpose of forming an air tight closure between the chamber heads 2 and 3, and rigidly holding the valves in place. There is no need to perforate the plate except .for the slots 19, 20, the bolts 4:, which are beyond the outer diameter of the plate, serving to clamp it in position. The plates are thus simple to make, the amount of fiexure is small and is always in the same direction from the plane of the plate and consequently these plates usually last for an indefinite period. 1

Referring now to thetype shown in F igure 5, the slots 19 are simply arcuate and omit the radial extensions 20 of the previously described type. This makes the valve somewhat stiffer, which is an advan tage in some cases.

Referring now to the non-gasket type shown in Figures 6 and 7, the construction and principle of operation is the same fore, but the valve is simply a disc 30 and the outer gasket portion 16 of the previously described type is totally absent. In such case it is desirable to provide a separate place by reason of the pressure exerted upon it by the two chamber heads 2, 3 which contact it along the diametral zone indicated by the line A-A and 13-13.

Having thus described our invention, what we claimas new and desire to secure by Letters Patent is:

1. A valve structure having a flat valve seat havin ports arranged in an arc, a thin, resilient plate the peripheral portion whereof is a ring severed from the internal portion except at a diametral zone, said internal por tion being adapted to cover and uncover theports by moving toward and from them in a direction substantially normal to the su' rface of the plate, and means for holding the peripheral portion of the plate in close contact with the valve seat, the internal portion The valve, however, isheld in being also partially severed from the diametral zone by slotted apertures running radially inward partway from the peripheral portion, toincrease the flexibility.

2. A valve structure having a flat ported valve seat and 'a thin resilient valve having one portion movable toward and from'the ports in a direction perpendicular to the plane of the valve, the valve being secured to the seat along-a strip of surface remote from the ports whereby the movement of the portclosing portion causes fiexure of the valve along a straight line, the valve having a permanent set or bend approximately along the line of flexure whereby the valve-normally presses slightly against the valve seat.

. 3. A valve structure having two flat, circular, ported valve seats faced oppositely to each other at a slight distance apart and having inlet ports at one portion near the a periphery and outlet ports at the diametrif cally opposite portion near theperiphery, and

portion of the valve making close contact with the valve seats to prevent leakage direct from the inlet to the outlet ports, the motion of the valve toward and from the ports causing flexure of the valve along the parallel lines at the borders of said zone, and the valves having a permanent bend or set tending to press them gently against the seats to close the ports.

In witness whereof we hereunto subscribe our names.

' HENRY B. BABSON. JACOB J. STAMPEN. 

